Operation Manual

LX90xx system Version 4.0 February 2014
Page 139 of 151
11 Options
11.1 Flarm
Before using Flarm it is highly recommended to read the Flarm user manual which
can be downloaded from www.flarm.com. Respect all limitations listed in this
document.
Flarm is a collision avoidance system developed by Flarm Technologies from Switzerland.
The Flarm module consists of following main parts: GPS receiver, microcontroller unit, radio
transceiver pressure altimeter and optional an external indicator. All electronic parts are
integrated into the main display unit cabinet. An exception is the radio communication
antenna and the Flarm External Display. Some input is possible via the external display.
11.1.1 Installation
The position of the radio communication antenna is extremely important as a bad
installation will reduce the system range dramatically. It is highly recommended to install
the antenna on the top of the instrument panel with a suitable aluminium round plate
having a diameter of about 12 cm used as a back plane and an approximately 10 cm long
rubber antenna used as the radiator. The metal plate may be mounted outside or inside of
the instrument panel. If carbon is used, use only the top mounting variant.
The antenna position must be mounted as vertical as possible. Use only the
original antenna which is always delivered with the unit. Use the original cable to
connect the main display unit to the antenna. Never use an antenna without the
original aluminium ground plane. If there is no space to install the metal
ground plane a dipole variant of the antenna is available. The picture shows the
connected GROUND PLANE antenna. With the system a DIPOLE antenna is
included which has an even better performance than a ground plane antenna.